Display device

Abstract

A display device includes a display panel and a switch panel. The display panel has a display surface and a bottom surface, where the bottom surface is located between the display surface and the switch panel. The switch panel includes a first substrate, a first transparent electrode layer, a first metal pattern layer, a first transparent conductive pattern layer, a second substrate, and a display medium disposed between the first substrate and the second substrate. The first transparent electrode layer is disposed on the first substrate and has a first grain size. The first metal pattern layer is disposed on the first transparent electrode layer and includes first openings exposing the first transparent electrode layer. The first transparent conductive pattern layer covers the first metal pattern layer and includes second openings exposing the first transparent electrode layer, and has a second grain size less than the first grain size.

What is claimed is: 
     
         1 . A display device, comprising:
 a display panel, having a display surface and a bottom surface opposite to the display surface; and   a switch panel, wherein the bottom surface is located between the display surface and the switch panel, and the switch panel comprises:
 a first substrate; 
 a first transparent electrode layer, disposed on the first substrate, and having a first grain size; 
 a first metal pattern layer, disposed on the first transparent electrode layer, and comprising a plurality of first openings exposing the first transparent electrode layer; 
 a first transparent conductive pattern layer, covering the first metal pattern layer, comprising a plurality of second openings exposing the first transparent electrode layer, and having a second grain size less than the first grain size; 
 a second substrate; and 
 a display medium, disposed between the first substrate and the second substrate. 
   
     
     
         2 . The display device of  claim 1 , wherein the switch panel further comprises:
 a second transparent electrode layer, disposed on the second substrate, and having a third grain size;   a second metal pattern layer, disposed on the second transparent electrode layer, and comprising a plurality of third openings exposing the second transparent electrode layer; and   a second transparent conductive pattern layer, covering the second metal pattern layer, comprising a plurality of fourth openings exposing the second transparent electrode layer, and having a fourth grain size less than the third grain size.   
     
     
         3 . The display device of  claim 2 , wherein the first grain size and the third grain size are both in a range from 45 nm to 55 nm, wherein the second grain size and the fourth grain size are both in a range from 30 nm to 40 nm. 
     
     
         4 . The display device of  claim 2 , wherein in a normal line of the first substrate, a portion of the first metal pattern layer does not overlap with the second metal pattern layer. 
     
     
         5 . The display device of  claim 2 , wherein the first metal pattern layer comprises a first oxide layer in contact with the first transparent conductive pattern layer, and the second metal pattern layer comprises a second oxide layer in contact with the second transparent conductive pattern layer, wherein a thickness of the first oxide layer and a thickness of the second oxide layer are both less than 5 nm. 
     
     
         6 . The display device of  claim 2 , wherein the first transparent conductive pattern layer covers an upper surface and a side surface of the first metal pattern layer, wherein the second transparent conductive pattern layer covers an upper surface and a side surface of the second metal pattern layer. 
     
     
         7 . The display device of  claim 2 , wherein a transmittance of the first transparent electrode layer and a transmittance of the second transparent electrode layer are greater than a transmittance of the first transparent conductive pattern layer and a transmittance of the second transparent conductive pattern layer, respectively. 
     
     
         8 . The display device of  claim 7 , wherein the transmittance of the first transparent electrode layer and the transmittance of the second transparent electrode layer are both greater than 95%, wherein the transmittance of the first transparent conductive pattern layer and the transmittance of the second transparent conductive pattern layer are both less than 95%. 
     
     
         9 . The display device of  claim 2 , wherein a sheet resistance of the first transparent conductive pattern layer and a sheet resistance of the second transparent conductive pattern layer are less than a sheet resistance of the first transparent electrode layer and a sheet resistance of the second transparent electrode layer, respectively. 
     
     
         10 . The display device of  claim 9 , wherein the sheet resistance of the first transparent conductive pattern layer and the sheet resistance of the second transparent conductive pattern layer are both less than 25Ω/□, wherein the sheet resistance of the first transparent electrode layer and the sheet resistance of the second transparent electrode layer are both greater than 25Ω/□. 
     
     
         11 . The display device of  claim 2 , wherein an annealing temperature of the first transparent electrode layer and an annealing temperature of the second transparent electrode layer are greater than an annealing temperature of the first transparent conductive pattern layer and an annealing temperature of the second transparent conductive pattern layer, respectively. 
     
     
         12 . The display device of  claim 11 , wherein the annealing temperature of the first transparent electrode layer and the annealing temperature of the second transparent electrode layer are both greater than 400° C., wherein the annealing temperature of the first transparent conductive pattern layer and the annealing temperature of the second transparent conductive pattern layer are both less than 300° C. 
     
     
         13 . The display device of  claim 2 , wherein a orthographic projection of the first metal pattern layer on the first substrate is located within a orthographic projection of the first transparent conductive pattern layer on the first substrate, wherein a orthographic projection of the second metal pattern layer on the second substrate is located within a orthographic projection of the second transparent conductive pattern layer on the second substrate. 
     
     
         14 . The display device of  claim 2 , wherein a orthographic projection of the second opening on the first substrate is located within a orthographic projection of the first opening on the first substrate, wherein a orthographic projection of the fourth opening on the second substrate is located within a orthographic projection of the third opening on the second substrate. 
     
     
         15 . The display device of  claim 1 , wherein the first transparent electrode layer comprises a plurality of transparent electrodes separated from each other, and the first metal pattern layer and the first transparent conductive pattern layer comprises a plurality of grid patterns separated from each other, respectively. 
     
     
         16 . The display device of  claim 15 , wherein the switch panel further comprises:
 a first wiring layer, disposed on the first substrate;   a first insulating layer, disposed on the first wiring layer, wherein the first transparent electrode layer is disposed on the first insulating layer; and   a through hole, extending through the first transparent electrode layer and the first insulating layer, wherein the first metal pattern layer is electrically connected to the first wiring layer through the through hole.   
     
     
         17 . The display device of  claim 16 , wherein in a normal line of the first substrate, the first wiring layer overlaps with the first metal pattern layer. 
     
     
         18 . A display device, comprising:
 a transparent display panel, having a display surface and a bottom surface opposite to the display surface; and   a switch panel, wherein the bottom surface is located between the display surface and the switch panel, and the switch panel comprises:
 a first substrate; 
 a first transparent electrode layer, disposed on the first substrate, and having a first grain size; 
 a first metal pattern layer, disposed on the first transparent electrode layer, and comprising a plurality of first openings exposing the first transparent electrode layer; 
 a first transparent conductive pattern layer, covering the first metal pattern layer, comprising a plurality of second openings exposing the first transparent electrode layer, and having a second grain size less than the first grain size; 
 a second substrate; and 
   a display medium, disposed between the first substrate and the second substrate.   
     
     
         19 . The display device of  claim 18 , wherein the transparent display panel is a micro light emitting diode panel or an organic light emitting diode panel. 
     
     
         20 . The display device of  claim 18 , wherein the display medium comprises a suspended particle layer, a polymer dispersed liquid crystal layer, or an electrochromic material layer.